<template>
    <div>
      <el-breadcrumb separator="/">
        <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item><a href="/">商品管理</a></el-breadcrumb-item>
        <el-breadcrumb-item>添加商品</el-breadcrumb-item>
      </el-breadcrumb>
      <el-card>
        <el-alert
          title="添加商品信息"
          type="info">
        </el-alert>
        <el-steps :space="200" :active="activeIndex-0" finish-status="success" align-center>
          <el-step title="基本信息"></el-step>
          <el-step title="商品参数"></el-step>
          <el-step title="商品属性"></el-step>
          <el-step title="商品图片"></el-step>
          <el-step title="商品内容"></el-step>
          <el-step title="完成"></el-step>
        </el-steps>
        <el-form ref="addFormRef" :rules="addRules" :model="addForm" label-position="top">
        <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="tabsSwitch" @tab-click="tabClick">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                expand-trigger="hover"
                v-model="addForm.goods_cat"
                :options="cateList"
                change-on-select
                :props="cateProps"
                @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <el-form-item :label="item.attr_name" v-for="(item, index) in manyDataList" :key="index">
              <el-checkbox-group v-model="item.attr_vals" @change="handleCheckedChange">
                <el-checkbox border v-for="(val, inde2) in item.attr_vals" :label="val" :key="inde2">{{val}}</el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="(item, index) in onlyDataList" :key="index">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <el-upload
              :action="uploadUrl"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              :headers="picUploadHeader"
              multiple
              :on-success="uploadSucess"
              :limit="3"
            >
              <el-button size="small" type="primary">点击上传</el-button>
              <div slot="tip">只能上传jpg/png文件，且不超过500kb</div>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <el-form-item prop="goods_introduce">
              <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            </el-form-item>
            <el-button @click="addGood" type="primary">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
        </el-form>
        <el-dialog
          title="提示"
          :visible.sync="picDialogVisible"
          width="50%"
          >
          <img :src="previewUrl" alt="" class="previewPic">
        </el-dialog>
      </el-card>
    </div>
</template>

<script>
import _ from 'lodash'
export default {
  name: 'Add',
  data() {
    return {
      activeIndex: '0',
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        goods_cat: '',
        pics: [],
        goods_introduce: ''
      },
      addRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ],
        goods_introduce: [
          { required: true, message: '请输入商品描述', trigger: 'blur' }
        ]
      },
      cateList: [],
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      uploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      picUploadHeader: {
        Authorization: window.sessionStorage.getItem('token')
      },
      manyDataList: [],
      onlyDataList: [],
      previewUrl: '',
      picDialogVisible: false
    }
  },
  methods: {
    async getCategories() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败')
      }
      this.cateList = res.data
    },
    handleChange() {
      if (this.addForm.goods_cat.length < 3) {
        this.addForm.goods_cat = []
      }
    },
    handlePreview(file) {
      this.previewUrl = file.response.data.url
      this.picDialogVisible = true
    },
    async addGood() {
      this.$refs.addFormRef.validate(validate => {
        if (!validate) {
          return this.$message.error('表单验证不通过')
        }
      })
      const temAddForm = _.cloneDeep(this.addForm)
      temAddForm.goods_cat = temAddForm.goods_cat.join(',')
      temAddForm.attrs = []
      this.manyDataList.forEach(item => {
        const newItem = { attr_id: item.attr_id, attr_vals: item.attr_vals.join(',') }
        temAddForm.attrs.push(newItem)
      })
      this.onlyDataList.forEach(item => {
        const newItem = { attr_id: item.attr_id, attr_vals: item.attr_vals}
        temAddForm.attrs.push(newItem)
      })
      const { data: res } = await this.$http.post('goods', temAddForm)
      if (res.meta.status !== 201) {
        return this.$message.error('添加商品失败')
      }
      this.$message.success('添加商品成功')
      this.$router.push('/goods')
    },
    handleRemove(file, fileList) {
      const i = this.addForm.pics.findIndex(item => item.pic === file.response.data.tmp_path)
      this.addForm.pics.splice(i, 1)
    },
    uploadSucess(response, file, fileList) {
      this.addForm.pics.push({ pic: response.data.tmp_path })
    },
    handleCheckedChange() {
      console.log(this.manyDataList)
    },
    tabsSwitch(newTabName, oldTabName) {
      if (oldTabName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('必须为三级分类才能往下切换哦')
        return false
      }
    },
    async tabClick() {
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取商品参数失败')
        }
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals ? item.attr_vals.split(',') : []
        })
        this.manyDataList = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'only' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取商品属性失败')
        }
        this.onlyDataList = res.data
      }
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  },
  created() {
    this.getCategories()
  }
}
</script>

<style scoped>
  .el-checkbox {
    margin: 0 10px 0 0 !important;
  }
  .previewPic {
    width: 100%;
  }
  .el-button {
    margin-top: 15px;
  }
</style>
